I googled a bit and found quite a lot of threads asking the same question. People often wrote it was 'The Horrorist - One Night in NYC', which - just like yours - my ears don't confirm.
However, one guy held he phoned a friend with 'contacts'. Allegedly, the producers of the advert confirmed that they used "the original song" of 'The Horrorist - One Night in NYC'.
Someone hat the idea that it might be an unreleased remix of said track by composer Nicolas Errera, as suggested by
http://www.nicolaserrera.com/ --> Commercials --> Armani.
[The thread (in German) can be found here:
http://www.deejayforum.de/30-id-boar...erbespots.html.]